In what will certainly be one of the most popular deals of the holiday season, American Express is giving cardmembers who spend at least $75 at Amazon.com by 12/31/31 a one-time $25 statement credit after they have synced their eligible American Express card.

Update 12/3/13: This offer is no longer available for sign up. Those who signed up prior to 12/3/13, however, still have the promo on their card and have until 12/31/13 to meet the spending requirement.

There are several ways that you can enroll in this promotion. (Note: Each American Express card is only eligible for a single statement credit, so you only need to register through one of these options.)

Option A. To enroll using Facebook:

• First make sure that you have “liked” the Amex Sync app and registered your Amex at https://apps.facebook.com/amexlinklikelove/.
• Once you have registered your American Express card with the app, you’ll be presented with a number of offers that you can add to your card. If your account is eligible for the Amazon.com offer, it will be presented to you here. (Note that you may need to click on the “Load more offers” button near the bottom of the page multiple times to view all of your offers.)
• When you see the Amazon.com offer, click the “Get Offer” button.
• A new frame will pop up with the offer terms. Click the “Add to Card” button to register your card for the promotion.
• Then spend at least $75 at Amazon.com by 12/31/13 using your synced Amex to earn your statement credit.

Option B. To enroll using Twitter:

• First, sync your Amex with Twitter. (See instructions here or see this post if you’re completely new to Twitter)
• Tweet using hashtag #AmexAmazon
• Wait to receive an “@ reply” message from @amexsync stating that this offer has been added to your card. You’ll see this message on the “@ Connect” page under “Mentions.” You may need to wait a while before it shows up. Then, use your synced Amex to purchase $75 or more at Amazon.com by 12/31/13.

Option C. Enroll through amexnetwork.com
If you don’t have a Twitter or Facebook account, you can also register for this promotion directly by visiting this page.

Your statement credit should appear on your billing statement within 90 days after 12/31/13. As is the case with all of the Amex Sync offers, if you have multiple American Express cards, you can register each card individually to receive a credit on each.

A few important notes: Enrollment is limited. Also, if you order an item during the offer period but it is not sent to you until after 12/31/13, it may not count towards determining whether your purchase qualifies. Full terms are available at this link.

Update 12/3/13: This offer is no longer available for sign up. Those who signed up prior to 12/3/13, however, still have the promo on their card and have until 12/31/13 to meet the spending requirement.

More Amex Sync Deals
In addition to the Amazon.com offer, there are a number of other Amex Sync deals currently ongoing. To register for these other offers using Twitter, see the following table:

Merchant	Discount	Hashtag	Dates Valid
Abt Electronics	Spend $200, get $20 back	#AmexAbt	11/18/13-12/31/13
AMC Theaters	Spend $20, get $5 back	#AmexAMC	11/15/13-12/31/13
Amtrak	Spend $150, get $30 back	#AmexAmtrak	11/15/13-2/15/14
CoffeeBean.com	Spend $80, get 20% back	#AmexCoffeeBean	11/15/13-12/31/13
JCPenney	Spend $50, get $10 back	#AmexJCPenney	11/15/13-12/31/13
LandsEnd.com	Spend $100, get $25 back	#AmexLandsEnd	11/21/13-12/31/13
Maggiano’s	Spend $50, get $15 back	#AmexMaggianos	11/14/13-12/30/13
Newegg Flash	Spend $50, get $10 back	#AmexNeweggFlash	11/15/13-12/31/13
P.F. Chang’s	Spend $40, get $10 back	#AmexPFChangs	11/15/13-12/31/13
SharperImage.com	Spend $125, get $25 back	#AmexSharperImg	11/11/13-1/31/14
Sony	Spend $100, get $25 back	#AmexSony	11/18/13-12/31/13
Sprouts	Spend $50, get $10 back	#AmexSprouts	11/15/13-1/31/14
Tory Burch	Spend $350, get $50 back	#AmexToryBurch	11/20/13-12/31/13
West Elm	Spend $150, get $30 back	#AmexWestElm	11/15/13-12/31/13
Zappos	Spend $150, get $30 back	#AmexZappos	11/15/13-12/31/13